ANALYSIS THE INFLUENCE OF FISSION PRODUCT POISONING ON TRIGA 2000 REACTOR BURNUP CALCULATIONS

• Main Author: Fauziah Sya'bani, Risyda
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74753
• Institution: Institut Teknologi Bandung

Nuclear reactors have played an important role in research and studies to study nuclear applications in various fields. One of the research reactors in Indonesia is the Bandung TRIGA 2000 reactor. This reactor have been used for various training and research purposes. Reactor operation is closely related to the criticality of the reactor core and the burnup of the fuel. In this study, a neutronic analysis was carried out on the operation of the TRIGA 2000 reactor using MCNP to review the operating conditions of the reactor. The neutronic aspect reviewed is the effective multiplication factor. Then ORIGEN is used to review the operating time until the reactor is subcritical and to calculate fuel burnup after operation has been done. This study was carried out with a fixed core configuration, the configuration used in the Bandung TRIGA 2000 reactor in 2018. There are four different case, reactor operation without burnable poisons, with Samarium -149, with Xenon-135 and with both Xenon-135 and Samarium 149. From the study it was found that the reactor operates in super critical conditions and becomes subcritical for each cases with different time. The longest operating time was without burnable poison and the shortest with both xenon-135 and samarium 149. The burnup fraction of the fuel elements was reviewed and it was found that the highest burnup was without burnable poisons and the lowest was with xenon and samarium cases. Composition for uranium 235 are reduced greatly on xenon poisoning cases. Composition for xenon are greatly increase on xenon poisoning cases. And lastly Samarium is produced more in cases of samarium poisoning.